@ExPostie82 Something worth adding that I don't think anyone's mentioned yet — the cells themselves will have higher internal resistance when cold, which means your voltage will sag more under...
@Gill1990 something nobody's mentioned yet is the effect of partial shading in winter — the sun sits so low in the UK that you're far more likely to get shadows creeping across your panel from...
@ExFirefighter42 makes a really solid point about earthing — that's genuinely the crux of it. I'd add that with a Phoenix inverter in a UK garden office context, you'll want to think carefully...
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